/*
 * vkbd.c - SDL virtual keyboard.
 *
 * Written by
 *  Hannu Nuotio <hannu.nuotio@tut.fi>
 *
 * Based on code by
 *  Mike Dawson <mike@gp2x.org>
 *
 * This file is part of VICE, the Versatile Commodore Emulator.
 * See README for copyright notice.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 *  02111-1307  USA.
 *
 */

#include "vice.h"

#include <stdio.h>

#include "joy.h"
#include "kbd.h"
#include "keyboard.h"
#include "keymap.h"
#include "menu_common.h"
#include "types.h"
#include "ui.h"
#include "uimenu.h"
#include "uipoll.h"
#include "videoarch.h"

#include "vkbd.h"


int sdl_vkbd_state = 0;

/* ------------------------------------------------------------------ */
/* static functions/variables */

static int vkbd_pos_x = 0;
static int vkbd_pos_y = 0;
static int vkbd_pos_max_x = 0;
static int vkbd_pos_max_y = 0;

static vkbd_t *vkbd = NULL;
static int vkbd_w = 0;
static int vkbd_h = 0;

static int vkbd_x = 0;
static int vkbd_y = 0;

static int vkbd_move = 0;

static int vkbd_shiftflags;

static UI_MENU_CALLBACK(custom_shift_callback)
{
    int flag = (1 << (vice_ptr_to_int(param)));

    if (activated) {
        vkbd_shiftflags ^= flag;
    } else {
        if (vkbd_shiftflags & flag) {
            return sdl_menu_text_tick;
        }
    }
    return NULL;
}

static const ui_menu_entry_t define_shift_options_menu[] = {
    {   .string   = "Virtual shift",
        .type     = MENU_ENTRY_OTHER,
        .callback = custom_shift_callback,
        .data     = (ui_callback_data_t)0
    },
    {   .string   = "Left shift",
        .type     = MENU_ENTRY_OTHER,
        .callback = custom_shift_callback,
        .data     = (ui_callback_data_t)1
    },
    {   .string   = "Right shift",
        .type     = MENU_ENTRY_OTHER,
        .callback = custom_shift_callback,
        .data     = (ui_callback_data_t)2
    },
    {   .string   = "Allow shift",
        .type     = MENU_ENTRY_OTHER,
        .callback = custom_shift_callback,
        .data     = (ui_callback_data_t)3
    },
    {   .string   = "Deshift shift",
        .type     = MENU_ENTRY_OTHER,
        .callback = custom_shift_callback,
        .data     = (ui_callback_data_t)4
    },
    {   .string   = "Allow other",
        .type     = MENU_ENTRY_OTHER,
        .callback = custom_shift_callback,
        .data     = (ui_callback_data_t)5
    },
    {   .string   = "Alt map",
        .type     = MENU_ENTRY_OTHER,
        .callback = custom_shift_callback,
        .data     = (ui_callback_data_t)8
    },
    SDL_MENU_LIST_END
};

static const ui_menu_entry_t shift_menu[] = {
    {   .string   = "Define shift options",
        .type     = MENU_ENTRY_SUBMENU,
        .callback = submenu_radio_callback,
        .data     = (ui_callback_data_t)define_shift_options_menu
    },
    SDL_MENU_LIST_END
};

#define VKBD_COMMAND_MOVE  0xff
#define VKBD_COMMAND_CLOSE 0xfe

static void sdl_vkbd_key_press(int value, int shift)
{
    int mr, mc, neg;
    uint8_t b, sb;

    b = vkbd->keytable[vkbd_x + vkbd_y * vkbd_w];

    if ((b == VKBD_COMMAND_CLOSE) && (value)) {
        sdl_vkbd_close();
        return;
    }

    if (b == VKBD_COMMAND_MOVE) {
        if (value && shift) {
            sdl_vkbd_close();
        } else {
            vkbd_move = value;
        }
        return;
    }

    neg = b & 0x08;

    if (shift && !neg) {
        sb = vkbd->shift;
        mc = (int)(sb & 0xf);
        mr = (int)((sb >> 4) & 0xf);
        keyboard_set_keyarr(mr, mc, value);
    }

    mc = (int)(b & 0x7);
    mr = (int)((b >> 4) & 0xf);

    if (neg) {
        mr = -mr;
    }

    keyboard_set_keyarr_any(mr, mc, value);
}

static void sdl_vkbd_key_map(void)
{
    int mr, mc, neg, i, j;
    uint8_t b;
    SDL_Event e;
    int unmap = 0;
    char keyname[10];

    b = vkbd->keytable[vkbd_x + vkbd_y * vkbd_w];

    if (b == VKBD_COMMAND_CLOSE) {
        return;
    }
    sdl_vkbd_state &= SDL_VKBD_REPAINT;

    sdl_ui_activate_pre_action();

    /* Use blank for unmapping */
    if (b == VKBD_COMMAND_MOVE) {
        unmap = 1;
    } else {
        /* get the key name for displaying */
        for (j = vkbd_x; (j > -1) && (vkbd->keytable[j + vkbd_y * vkbd_w] == b); --j) {
        }
        ++j;

        for (i = 0; ((i + j) < vkbd_w) && (vkbd->keytable[i + j + vkbd_y * vkbd_w] == b); ++i) {
            keyname[i] = vkbd->keyb[vkbd_y][i + j];
        }

        keyname[i] = 0;
    }

    neg = b & 0x08;
    mc = (int)(b & 0x7);
    mr = (int)((b >> 4) & 0xf);

    if (neg) {
        mr = -mr;
    }

    e = sdl_ui_poll_event("key or joystick event", unmap ? "(unmap)" : keyname, -1, 1, 1, 1, 5);

    /* TODO check if key/event is suitable */
    switch (e.type) {
        case SDL_KEYDOWN:
            if (!unmap) {
                vkbd_shiftflags = (1 << 3);
                sdl_ui_external_menu_activate((ui_menu_entry_t *)shift_menu);
                keyboard_set_map_any((signed long)SDL2x_to_SDL1x_Keys(e.key.keysym.sym), mr, mc, vkbd_shiftflags);
            } else {
                keyboard_set_unmap_any((signed long)SDL2x_to_SDL1x_Keys(e.key.keysym.sym));
            }
            break;
#ifdef HAVE_SDL_NUMJOYSTICKS
        case SDL_JOYAXISMOTION:
        case SDL_JOYBUTTONDOWN:
        case SDL_JOYHATMOTION:
            if (unmap) {
                sdljoy_unset(e);
            } else {
                sdljoy_set_keypress(e, mr, mc);
            }
            break;
#endif
        default:
            break;
    }

    sdl_ui_activate_post_action();
    sdl_vkbd_state = SDL_VKBD_ACTIVE;
}

static inline void sdl_vkbd_move(int *var, int amount, int min, int max)
{
    *var += amount;

    if (*var < min) {
        *var = max - 1;
    } else if (*var >= max) {
        *var = min;
    }

    sdl_vkbd_state |= SDL_VKBD_REPAINT;
}

/* ------------------------------------------------------------------ */
/* External interface */

void sdl_vkbd_set_vkbd(const vkbd_t *machine_vkbd)
{
    vkbd = (vkbd_t *)machine_vkbd;

    if (vkbd == NULL) {
        return;
    }

    for (vkbd_h = 0; vkbd->keyb[vkbd_h] != NULL; ++vkbd_h) {
    }

    if (vkbd_h > 0) {
        for (vkbd_w = 0; vkbd->keyb[0][vkbd_w] != 0; ++vkbd_w) {
        }
    }
}

void sdl_vkbd_activate(void)
{
    menu_draw_t *limits = NULL;

    if (vkbd == NULL) {
        return;
    }

    sdl_ui_init_draw_params(sdl_active_canvas);
    limits = sdl_ui_get_menu_param();

    vkbd_pos_max_x = limits->max_text_x - vkbd_w + 1;
    vkbd_pos_max_y = limits->max_text_y - vkbd_h + 1;

    if (vkbd_pos_x >= vkbd_pos_max_x) {
        vkbd_pos_x = vkbd_pos_max_x - 1;
    }

    if (vkbd_pos_y >= vkbd_pos_max_y) {
        vkbd_pos_y = vkbd_pos_max_y - 1;
    }

    sdl_vkbd_state = SDL_VKBD_ACTIVE | SDL_VKBD_REPAINT;
    vkbd_move = 0;
}

void sdl_vkbd_close(void)
{
    keyboard_key_clear();
    sdl_vkbd_state = SDL_VKBD_REPAINT;
}

void sdl_vkbd_draw(void)
{
    int i;
    sdl_ui_set_active_font(MENU_FONT_MONITOR);

    for (i = 0; i < vkbd_h; ++i) {
        sdl_ui_print(vkbd->keyb[i], vkbd_pos_x, vkbd_pos_y + i);
    }

    sdl_ui_invert_char(vkbd_pos_x + vkbd_x, vkbd_pos_y + vkbd_y);

    sdl_ui_set_active_font(MENU_FONT_ASCII);

}

int sdl_vkbd_process(ui_menu_action_t input)
{
    int retval = 1;

    switch (input) {
        case MENU_ACTION_UP:
            if (vkbd_move) {
                sdl_vkbd_move(&vkbd_pos_y, -1, 0, vkbd_pos_max_y);
            } else {
                sdl_vkbd_move(&vkbd_y, -1, 0, vkbd_h);
            }
            break;
        case MENU_ACTION_DOWN:
            if (vkbd_move) {
                sdl_vkbd_move(&vkbd_pos_y, 1, 0, vkbd_pos_max_y);
            } else {
                sdl_vkbd_move(&vkbd_y, 1, 0, vkbd_h);
            }
            break;
        case MENU_ACTION_LEFT:
            if (vkbd_move) {
                sdl_vkbd_move(&vkbd_pos_x, -1, 0, vkbd_pos_max_x);
            } else {
                sdl_vkbd_move(&vkbd_x, -1, 0, vkbd_w);
            }
            break;
        case MENU_ACTION_RIGHT:
            if (vkbd_move) {
                sdl_vkbd_move(&vkbd_pos_x, 1, 0, vkbd_pos_max_x);
            } else {
                sdl_vkbd_move(&vkbd_x, 1, 0, vkbd_w);
            }
            break;
        case MENU_ACTION_SELECT:
            sdl_vkbd_key_press(1, 0);
            break;
        case MENU_ACTION_SELECT_RELEASE:
            sdl_vkbd_key_press(0, 0);
            break;
        case MENU_ACTION_CANCEL:
            sdl_vkbd_key_press(1, 1);
            break;
        case MENU_ACTION_CANCEL_RELEASE:
            sdl_vkbd_key_press(0, 1);
            break;
        case MENU_ACTION_MAP:
            sdl_vkbd_key_map();
            retval = 0;
            break;
        case MENU_ACTION_EXIT:
            sdl_vkbd_close();
            retval = 0;
            break;
        default:
            retval = 0;
            break;
    }

    return retval;
}

/* ------------------------------------------------------------------ */
/* virtual keyboards */

static const char *keyb_c64[] = {
    "X \x5f 1234567890+-\x5ch del  F1",
    "ctrl QWERTYUIOP@*\x5e rstr F3",
    "r/s   ASDFGHJKL:;= rtrn F5",
    "c= sh  ZXCVBNM,./v> sh  F7",
    "        space             ",
    NULL
};

static const uint8_t keytable_c64[] =
    "\xfe\xff\x71\xff\x70\x73\x10\x13\x20\x23\x30\x33\x40\x43\x50\x53\x60\x63\xff\x00\x00\x00\xff\xff\x04\x04"
    "\x72\x72\x72\x72\xff\x76\x11\x16\x21\x26\x31\x36\x41\x46\x51\x56\x61\x66\xff\x38\x38\x38\x38\xff\x05\x05"
    "\x77\x77\x77\xff\xff\xff\x12\x15\x22\x25\x32\x35\x42\x45\x52\x55\x62\x65\xff\x01\x01\x01\x01\xff\x06\x06"
    "\x75\x75\xff\x17\x17\xff\xff\x14\x27\x24\x37\x34\x47\x44\x57\x54\x67\x07\x02\xff\x64\x64\xff\xff\x03\x03"
    "\xff\xff\xff\xff\xff\xff\xff\xff\x74\x74\x74\x74\x74\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";

static const uint8_t keytable_vic20[] =
    "\xfe\xff\x01\xff\x00\x07\x10\x17\x20\x27\x30\x37\x40\x47\x50\x57\x60\x67\xff\x70\x70\x70\xff\xff\x74\x74"
    "\x02\x02\x02\x02\xff\x06\x11\x16\x21\x26\x31\x36\x41\x46\x51\x56\x61\x66\xff\x38\x38\x38\x38\xff\x75\x75"
    "\x03\x03\x03\xff\xff\xff\x12\x15\x22\x25\x32\x35\x42\x45\x52\x55\x62\x65\xff\x71\x71\x71\x71\xff\x76\x76"
    "\x05\x05\xff\x13\x13\xff\xff\x14\x23\x24\x33\x34\x43\x44\x53\x54\x63\x73\x72\xff\x64\x64\xff\xff\x77\x77"
    "\xff\xff\xff\xff\xff\xff\xff\xff\x04\x04\x04\x04\x04\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";

vkbd_t vkbd_c64 = {
    keyb_c64,
    keytable_c64,
    '\x17'
};

vkbd_t vkbd_vic20 = {
    keyb_c64,
    keytable_vic20,
    '\x13'
};

static const char *keyb_c64dtv[] = {
    "X \x5f 1234567890+-\x5ch del  F1",
    "ctrl QWERTYUIOP@*\x5e rstr F3",
    "r/s   ASDFGHJKL:;= rtrn F5",
    "c= sh  ZXCVBNM,./v> sh  F7",
    "        space      ABCD R ",
    NULL
};

static const uint8_t keytable_c64dtv[] =
    "\xfe\xff\x71\xff\x70\x73\x10\x13\x20\x23\x30\x33\x40\x43\x50\x53\x60\x63\xff\x00\x00\x00\xff\xff\x04\x04"
    "\x72\x72\x72\x72\xff\x76\x11\x16\x21\x26\x31\x36\x41\x46\x51\x56\x61\x66\xff\x38\x38\x38\x38\xff\x05\x05"
    "\x77\x77\x77\xff\xff\xff\x12\x15\x22\x25\x32\x35\x42\x45\x52\x55\x62\x65\xff\x01\x01\x01\x01\xff\x06\x06"
    "\x75\x75\xff\x17\x17\xff\xff\x14\x27\x24\x37\x34\x47\x44\x57\x54\x67\x07\x02\xff\x64\x64\xff\xff\x03\x03"
    "\xff\xff\xff\xff\xff\xff\xff\xff\x74\x74\x74\x74\x74\xff\xff\xff\xff\xff\xff\x04\x00\x01\x02\xff\x03\xff";

vkbd_t vkbd_c64dtv = {
    keyb_c64dtv,
    keytable_c64dtv,
    '\x17'
};

static const char *keyb_c128[] = {
    "X etac hldn \x5ev<> f1 f3 f5 f7",
    "  \x5f 1234567890+-\x5ch  del 789+",
    "ctrl QWERTYUIOP@*\x5e rstr 456-",
    "r/s   ASDFGHJKL:;= rtrn 123e",
    "c= sh  ZXCVBNM,./v> sh  0 .e",
    "         space              ",
    NULL
};

static const uint8_t keytable_c128[] =
    "\xfe\xff\x90\x83\xa0\x49\xff\x80\x93\x48\xa7\xff\xa3\xa4\xa5\xa6\xff\x04\x04\xff\x05\x05\xff\x06\x06\xff\x03\x03"
    "\xff\xff\x71\xff\x70\x73\x10\x13\x20\x23\x30\x33\x40\x43\x50\x53\x60\x63\xff\xff\x00\x00\x00\xff\x86\x81\x96\x91"
    "\x72\x72\x72\x72\xff\x76\x11\x16\x21\x26\x31\x36\x41\x46\x51\x56\x61\x66\xff\x38\x38\x38\x38\xff\x85\x82\x95\x92"
    "\x77\x77\x77\xff\xff\xff\x12\x15\x22\x25\x32\x35\x42\x45\x52\x55\x62\x65\xff\x01\x01\x01\x01\xff\x87\x84\x97\x94"
    "\x75\x75\xff\x17\x17\xff\xff\x14\x27\x24\x37\x34\x47\x44\x57\x54\x67\x07\x02\xff\x64\x64\xff\xff\xa1\xff\xa2\x94"
    "\xff\xff\xff\xff\xff\xff\xff\xff\xff\x74\x74\x74\x74\x74\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";

vkbd_t vkbd_c128 = {
    keyb_c128,
    keytable_c128,
    '\x17'
};

static const char *keyb_plus4[] = {
    "X  F1 F2 F3 Help       ",
    "esc 1234567890+-=h  del",
    "ctrl QWERTYUIOP@\x5c* ctrl",
    "rs sh ASDFGHJKL:; rtrn ",
    "c=  sh ZXCVBNM,./ sh \x5e ",
    "         space      \x5fv>",
    NULL
};

static const uint8_t keytable_plus4[] =
    "\xfe\xff\xff\x04\x04\xff\x05\x05\xff\x06\x06\xff\x03\x03\x03\x03\xff\xff\xff\xff\xff\xff\xff"
    "\x64\x64\x64\xff\x70\x73\x10\x13\x20\x23\x30\x33\x40\x43\x66\x56\x65\x71\xff\xff\x00\x00\x00"
    "\x72\x72\x72\x72\xff\x76\x11\x16\x21\x26\x31\x36\x41\x46\x51\x07\x02\x61\xff\x72\x72\x72\x72"
    "\x77\x77\xff\x17\x17\xff\x12\x15\x22\x25\x32\x35\x42\x45\x52\x55\x62\xff\x01\x01\x01\x01\xff"
    "\x75\x75\xff\xff\x17\x17\xff\x14\x27\x24\x37\x34\x47\x44\x57\x54\x67\xff\x17\x17\xff\x53\xff"
    "\xff\xff\xff\xff\xff\xff\xff\xff\xff\x74\x74\x74\x74\x74\xff\xff\xff\xff\xff\xff\x60\x50\x63";

vkbd_t vkbd_plus4 = {
    keyb_plus4,
    keytable_plus4,
    '\x17'
};

static const char *keyb_cbm2[] = {
    "X f1234567890 v\x5e<> conr/s",
    "esc 1234567890-=\x5ci/d ?c*/",
    "tab  QWERTYUIOP()rtn 789-",
    "shift ASDFGHJKL;'_rt 456+",
    " shift ZXCVBNM,./sc= 123e",
    "    ctrl space       0.0e",
    NULL
};

static const uint8_t keytable_cbm2[] =
    "\xfe\xff\x80\x80\x90\xa0\xb0\xc0\xd0\xe0\xf0\x00\x10\xff\x20\x30\x31\x32\xff\x40\x50\x60\x70\x70\x70"
    "\x70\x70\x70\xff\x91\xa1\xb1\xc1\xd1\xd2\xe1\xf1\x01\x11\x12\x21\x22\x33\x33\x33\xff\x41\x51\x61\x71"
    "\x82\x82\x82\xff\xff\x92\xa2\xb2\xc2\xc3\xd3\xe2\xf2\x02\x13\x14\x23\x24\x24\x24\xff\x42\x52\x62\x72"
    "\x84\x84\x84\x84\x84\xff\x93\xa3\xb3\xb4\xc4\xd4\xe3\xf3\x03\x04\x15\x25\x24\x24\xff\x43\x53\x63\x73"
    "\xff\x84\x84\x84\x84\x84\xff\x94\xa4\xa5\xb5\xc5\xd5\xe4\xf4\xf5\x05\x83\x34\x34\xff\x44\x54\x64\x74"
    "\xff\xff\xff\xff\x85\x85\x85\x85\xff\xe5\xe5\xe5\xe5\xe5\xff\xff\xff\xff\xff\xff\xff\x45\x55\x65\x74";

vkbd_t vkbd_cbm2 = {
    keyb_cbm2,
    keytable_cbm2,
    '\x84'
};

/* FIXME: support all PET keyboards (see pet-resources.h) */

static const char *keyb_pet_uk[] = {
    "X \x5f 1234567890:-\x5e> r/s  789",
    "tab QWERTYUIOP\x5b\\v del   456",
    "esc ASDFGHJKL;@\x5d  rtrn  123",
    "rvs sh ZXCVBNM,./ sh rh 0 .",
    "        space              ",
    NULL
};

static const uint8_t keytable_pet_uk[] =
    "\xfe\xff\x90\xff\x10\x00\x91\x11\x01\x92\x12\x02\x93\x13\x95\x03\x15\x05\xff\x20\x20\x20\xff\xff\x14\x04\x17"
    "\x40\x40\x40\xff\x50\x41\x51\x42\x52\x43\x53\x45\x55\x46\x56\x44\x54\xff\x47\x47\x47\xff\xff\xff\x57\x27\x37"
    "\x20\x20\x20\xff\x30\x21\x31\x22\x32\x23\x33\x25\x35\x26\x36\x24\xff\xff\x34\x34\x34\x34\xff\xff\x87\x77\x67"
    "\x80\x80\x80\xff\x60\x60\xff\x70\x81\x61\x71\x62\x72\x83\x73\x63\x86\xff\x66\x66\xff\x76\x84\xff\x74\xff\x64"
    "\xff\xff\xff\xff\xff\xff\xff\xff\x74\x74\x74\x74\x74\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";

vkbd_t vkbd_pet_uk = {
    keyb_pet_uk,
    keytable_pet_uk,
    '\x60'
};

static const char *keyb_pet_gr[] = {
    "X   @!\"#$%'&\\()\x5f[]    hv<i",
    "rvs QWERTYUIOP\x5e<>     789/",
    "    ASDFGHJKL: rs rtn 456*",
    " sh ZXCVBNM,;? sh     123+",
    "        space         0.-=",
    NULL
};

static const uint8_t keytable_pet_gr[] =
    "\xfe\xff\xff\xff\x81\x00\x10\x01\x11\x02\x12\x03\x13\x04\x14\x05\x91\x82\xff\xff\xff\xff\x06\x16\x07\x18"
    "\x90\x90\x90\xff\x20\x30\x21\x31\x22\x32\x23\x33\x24\x34\x25\x93\x84\xff\xff\xff\xff\xff\x26\x36\x27\x37"
    "\xff\xff\xff\xff\x40\x50\x41\x51\x42\x52\x43\x53\x44\x54\xff\x94\x94\xff\x65\x65\x65\xff\x46\x56\x47\xff"
    "\xff\x80\x80\xff\x60\x70\x61\x71\x62\x72\x63\x73\x64\x74\xff\x85\x85\xff\xff\xff\xff\xff\x66\x76\x67\x77"
    "\xff\xff\xff\xff\xff\xff\xff\xff\x92\x92\x92\x92\x92\xff\xff\xff\xff\xff\xff\xff\xff\xff\x86\x96\x87\x97";

vkbd_t vkbd_pet_gr = {
    keyb_pet_gr,
    keytable_pet_gr,
    '\x80'
};